Brayden Schenn became the latest Blue to join the club in Monday's 5-1 win against the Arizona Coyotes.
Schenn joined teammates David Perron, Ivan Barbashev, Vladimir Tarasenko, Jordan Kyrou, Brandon Saad and Pavel Buchnevich in the 20-goal club.
As of Tuesday, the Blues were the only team in the NHL to boast seven 20-goal scorers.
The Blues rank fourth overall in the NHL with 248 goals this season - their 3.59 goals-per-game average is the ninth-best in franchise history.
In the 1984-85 season, Joe Mullen, Brian Sutter, Bernie Federko, Jorgen Pettersson, Doug Wickenheiser, Greg Paslawski and Doug Gilmour each finished with at least 20 goals.
The team record for the most 20-goal scorers in one season is 10, which was set in the 1980-81 season.
